Duocameratus


Classification: Mesozoic -> Holococcoliths -> Rarer genera -> Duocameratus
Sister taxa: Bifidalithus, Bilapillus, Multipartis, Munarinus, Octolithus, Okkolithus, Ottavianus, Pharus, Ramsaya, Russellia, Saepiovirgata ⟩⟨ Acuturris, Anfractus, Duocameratus, Lacunolithus-Bown, Metadoga, Nicholasia, Paulpearsonia, Petrobrasiella, Pseudoconus, Semihololithus, Stereorhabdus, Tanzanella, Thecatus, unidentified holococcoliths

Distinguishing features: Cavate holococcolith with central septum


Daughter taxa: (blue => in age window 0-800Ma)
Duocameratus leariae
Kite-shaped in typical view, with septum running along long axis, pointed end with thickening of the wall
Duocameratus sianiae
Pentagonal shape in profile with flattened base, and pointed distal surface and slightly flaring walls; septum central.
Duocameratus sp.
Specimens not identified to species level

Taxonomy:

Citation: Duocameratus Lees, 2007
Rank: Genus
Type species: Duocameratus leariae Lees, 2007

Farinacci & Howe catalog pages: Duocameratus *

Distinguishing features: Cavate holococcolith with central septum

Search data:
TagsLITHS: holococcolith, pentagonal, quadrate, hollow, CA: bar, CROSS-POLARS: 1ou,
MetricsLith size: 2.5->5µm;
Data source notes: size range of included species
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): at top of Turonian Stage (100% up, 89.8Ma, in Turonian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Cenomanian Stage (0% up, 100.5Ma, in Cenomanian stage). Data source: Total of range of species in this database

Plot of occurrence data:

References:

Lees, J. A. (2007). New and rarely reported calcareous nannofossils from the Late Cretaceous of coastal Tanzania: outcrop samples and Tanzania Drilling Project Sites 5, 9 and 15. Journal of Nannoplankton Research. 29(1): 39-65. gs V O


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Duocameratus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 3-12-2020

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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10400 Go to Archive.is to create a permanent copy of this page - citation notes



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